Operating Manual
UL
POWER
UL260i UL260i
F
UL260i
S
UL260i
SA
MO 260A01 Revision No: 6
Date:
2014-09-15
Page: 21 of 22
On the ground, verify that cooling ducts are still in place and air is free to flow over and through
cylinder head cooling fins. If problem remains, the engine should be sent for inspection/overhaul to
a ULPower authorised service-centre.
Exceeding of max. admissible oil temperature
Reduce engine power setting to the minimum necessary and verify that oil temperature drops.
Continue normal flight within temperature limits.
WARNING
: If temperature does not drop, carry out emergency/precautionary landing.
Any exceeding of the max. admissible oil temperature has to be entered by the pilot into the
logbook, stating duration and extent of over-temperature condition.
On the ground, verify that oil level is sufficient and air is free to flow through oil cooler. If problem
remains, the engine should be sent for inspection/overhaul to a ULPower authorised service-centre.
Oil pressure below minimum
WARNING
: Oil pressure should be above minimum at all times. If not, the engine should be
stopped immediately or as soon as possible.
In flight, reduce engine power setting and speed to the minimum necessary and carry out
emergency/precautionary landing.
Any exceeding of the oil pressure under the minimum oil pressure has to be entered by the pilot
into the logbook, stating duration and extent of under-pressure condition.
On the ground, verify that oil level is sufficient and that no oil leaks are present. Check that oil
lines to and from the oil cooler are not twisted/blocked or leaking. If oil cooler and oil lines are not
blocked, oil filter should be inspected and changed. If problem remains, the engine should be sent
for inspection/overhaul to a ULPower authorised service-centre.
Exceeding of max. admissible oil pressure
WARNING
: Oil pressure should be below the maximum at all times. If not, the engine should be
stopped immediately or as soon as possible.
Note:
At cold start, the oil pressure could be higher for several minutes as the oil is still cold and
not as liquid, resulting in a higher pressure. Nevertheless, the maximum pressures of both
warm and cold engines should not be exceeded as it indicates a problem with the pressure
relief valve or oil lines/galleries and thus no/improper lubrication.
Any exceeding of the max. admissible oil pressure has to be entered by the pilot into the logbook,
stating duration and extent of over-pressure condition.
On the ground, verify the oil level. Check pressure relief valve. If problem remains, the engine
should be sent to a ULPower authorised service-centre for inspection/overhaul.
Relative fuel pressure deviates from normal
WARNING
: Verify that fuel level and battery voltage are sufficient (min 12 VDC), and that the
electrical system is working properly. If battery voltage is running low, switch off
unnecessary electrical consumers. Carry out emergency/precautionary landing.
Note:
A change in relative fuel pressure influences the air-fuel mixture. If pressure drops, the
mixture becomes too lean; if pressure rises, the mixture becomes to rich. Any deviation in
the correct air-fuel ratio can influence the power output of the engine.
Attention
: A too lean fuel mixture can cause knocking, and severe damage to the engine.
While the engine is not running (ignition off, but master switch and fuel pump on) the same
problems should show.
